Process of producing ammonia



WAR wsmrsrn osnnnenao, or LIDINGt'i-lensvnz muons TO HELGE marries neoxsrnora, 0F IDJURSHOLM, SWEDEN,

Pia-TENT OFFICE.

SWEDEN, ASSIGNDR 0F SEVEDL AND GUSTAF A'DOLF KYHLBEZZG'ER, OF STOOKHOLM, SWEDEN.

PROCESS OF PRODUCING AMMONIA Application filed February To (ZZZ av/ 10m it may 0012 cam.

Be it known that 1, Iran WALFRIJ) Cessnsuoject of Kingof Sweden. residing at LidingdBrerilr, the Kingdom of Sireden, have inventednow and useful Improv -ents in Processes of Producing Ammonia, of which the toll Wlllg is a specification.

Itis known that synthetic product-ion LElZDO f may'h I f d by alternately 9 01. passing r trogen and h ologen at increas d temperaiure and under pressure, it required, over certain metals, for instance molybdenum. or over their hydrids or nitrids, or combinations thereof, ammonia being formed either during one of the periods or during both periods. The reaction taking place mar be disgrammatically illustrated by means o the following "formulas. in WillCll a metal:

is done of ammonia obtained in this have been very unsatisnt. invention refers to an imon the ogocess aboi'e reierred to, i l rlv good esults The impror eon ts in essure exceeding lob atmospheres nll rO- L oer-10d, and 111 alters ng the nitrogen and hydrogen nee containm at least one metal no svslem-viz... zinc. cadmi I mercai thallium. rmamum, t

arsenic. antimonv and bismuth. Tl-

be used in metallio state, eiti sepa rat lv ormixed with one another. Owing -15 to a low melting point, or on account volatiu ty, orrever, some of the metals, for instance mercury indium and arsenic, are not Specification of Letters Patent.

3,1919. Serial No. 218,885

der pressure, if required, react with nitro gen and hydrogen or with ments.

It is essential to the use with the said metals an exceedingly high pressure, which may be defined as over 25.0v atmospheres, during the nitrogen period in. order that, a metal-nitrogen compound may be formed. The velocity of reaction may be increased by finely dividing and in some cases also by mixing the said metals. or compounds with other substances, which may for instance be indiilerent; and serve as carriers, such as asbestos, chamo'tte, intt'usorial earth. During the hydrogen period, on the other hand, the ordinary atmospheric pressure may be used, and the reduction should be effected at the lowest possible temperature. Thus the pressure and the tempera ture are as arule difierent during the two )QZlOdS.

The favorable action obtained according to the present invention by the use of the metals or metal compounds above referred to. is due to the nitrids of said metals being ole, which is a feature common to all is her referred'to by which they are characteristically distinguished from the metals heretofore used, and which makes it possible to perform the-reduction at a lower temperature than heretofore used and thus to obtain a larger yield of ammonia.

I claim:

A proCeSS of synthetic production of ammonia consisting in alternately passing nimogen and hydrogen over a substance containing at least one metal forming an unstable nitrid while using a pressure exceeding 250 atmospheres during the nitrogen period.

IVAR WALFRID CEDERBERG.

one of these ele- 

